12 Days of Christmas
80
Abundant Numbers
678
Card Number Validation
473
Collatz
689
Day of Week
623
Evil Numbers
741
Evil Numbers (Long)
726
Fibonacci
602
Fizz Buzz
554
Fractions
568
Leap Years
694
Niven Numbers
708
Niven Numbers (Long)
774
Odious Numbers
687
Odious Numbers (Long)
675
Prime Numbers
553
Prime Numbers (Long)
586
π
134362